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1 | /** |
2 | * | |
3 | * Synaptics Register Mapped Interface (RMI4) I2C Physical Layer Driver. | |
4 | * Copyright (c) 2007-2010, Synaptics Incorporated | |
5 | * | |
6 | * Author: Js HA <js.ha@stericsson.com> for ST-Ericsson | |
7 | * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson | |
8 | * Copyright 2010 (c) ST-Ericsson AB | |
9 | */ | |
10 | /* | |
11 | * This file is licensed under the GPL2 license. | |
12 | * | |
13 | *############################################################################# | |
14 | * GPL | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify it | |
17 | * under the terms of the GNU General Public License version 2 as published | |
18 | * by the Free Software Foundation. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, but | |
21 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
22 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
23 | * for more details. | |
24 | * | |
25 | *############################################################################# | |
26 | */ | |
27 | ||
28 | #include <linux/input.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/i2c.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/regulator/consumer.h> | |
33 | #include "synaptics_i2c_rmi4.h" | |
34 | ||
35 | /* TODO: for multiple device support will need a per-device mutex */ | |
36 | #define DRIVER_NAME "synaptics_rmi4_i2c" | |
37 | ||
38 | #define MAX_ERROR_REPORT 6 | |
39 | #define MAX_TOUCH_MAJOR 15 | |
40 | #define MAX_RETRY_COUNT 5 | |
41 | #define STD_QUERY_LEN 21 | |
42 | #define PAGE_LEN 2 | |
43 | #define DATA_BUF_LEN 32 | |
44 | #define BUF_LEN 37 | |
45 | #define QUERY_LEN 9 | |
46 | #define DATA_LEN 12 | |
47 | #define HAS_TAP 0x01 | |
48 | #define HAS_PALMDETECT 0x01 | |
49 | #define HAS_ROTATE 0x02 | |
50 | #define HAS_TAPANDHOLD 0x02 | |
51 | #define HAS_DOUBLETAP 0x04 | |
52 | #define HAS_EARLYTAP 0x08 | |
53 | #define HAS_RELEASE 0x08 | |
54 | #define HAS_FLICK 0x10 | |
55 | #define HAS_PRESS 0x20 | |
56 | #define HAS_PINCH 0x40 | |
57 | ||
58 | #define MASK_16BIT 0xFFFF | |
59 | #define MASK_8BIT 0xFF | |
60 | #define MASK_7BIT 0x7F | |
61 | #define MASK_5BIT 0x1F | |
62 | #define MASK_4BIT 0x0F | |
63 | #define MASK_3BIT 0x07 | |
64 | #define MASK_2BIT 0x03 | |
65 | #define TOUCHPAD_CTRL_INTR 0x8 | |
66 | #define PDT_START_SCAN_LOCATION (0x00E9) | |
67 | #define PDT_END_SCAN_LOCATION (0x000A) | |
68 | #define PDT_ENTRY_SIZE (0x0006) | |
69 | #define RMI4_NUMBER_OF_MAX_FINGERS (8) | |
70 | #define SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM (0x11) | |
71 | #define SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM (0x01) | |
72 | ||
73 | /** | |
74 | * struct synaptics_rmi4_fn_desc - contains the funtion descriptor information | |
75 | * @query_base_addr: base address for query | |
76 | * @cmd_base_addr: base address for command | |
77 | * @ctrl_base_addr: base address for control | |
78 | * @data_base_addr: base address for data | |
79 | * @intr_src_count: count for the interrupt source | |
80 | * @fn_number: function number | |
81 | * | |
82 | * This structure is used to gives the function descriptor information | |
83 | * of the particular functionality. | |
84 | */ | |
85 | struct synaptics_rmi4_fn_desc { | |
86 | unsigned char query_base_addr; | |
87 | unsigned char cmd_base_addr; | |
88 | unsigned char ctrl_base_addr; | |
89 | unsigned char data_base_addr; | |
90 | unsigned char intr_src_count; | |
91 | unsigned char fn_number; | |
92 | }; | |
93 | ||
94 | /** | |
95 | * struct synaptics_rmi4_fn - contains the funtion information | |
96 | * @fn_number: function number | |
97 | * @num_of_data_sources: number of data sources | |
98 | * @num_of_data_points: number of fingers touched | |
99 | * @size_of_data_register_block: data register block size | |
100 | * @index_to_intr_reg: index for interrupt register | |
101 | * @intr_mask: interrupt mask value | |
102 | * @fn_desc: variable for function descriptor structure | |
103 | * @link: linked list for function descriptors | |
104 | * | |
105 | * This structure gives information about the number of data sources and | |
106 | * the number of data registers associated with the function. | |
107 | */ | |
108 | struct synaptics_rmi4_fn { | |
109 | unsigned char fn_number; | |
110 | unsigned char num_of_data_sources; | |
111 | unsigned char num_of_data_points; | |
112 | unsigned char size_of_data_register_block; | |
113 | unsigned char index_to_intr_reg; | |
114 | unsigned char intr_mask; | |
115 | struct synaptics_rmi4_fn_desc fn_desc; | |
116 | struct list_head link; | |
117 | }; | |
118 | ||
119 | /** | |
120 | * struct synaptics_rmi4_device_info - contains the rmi4 device information | |
121 | * @version_major: protocol major version number | |
122 | * @version_minor: protocol minor version number | |
123 | * @manufacturer_id: manufacturer identification byte | |
124 | * @product_props: product properties information | |
125 | * @product_info: product info array | |
126 | * @date_code: device manufacture date | |
127 | * @tester_id: tester id array | |
128 | * @serial_number: serial number for that device | |
129 | * @product_id_string: product id for the device | |
130 | * @support_fn_list: linked list for device information | |
131 | * | |
132 | * This structure gives information about the number of data sources and | |
133 | * the number of data registers associated with the function. | |
134 | */ | |
135 | struct synaptics_rmi4_device_info { | |
136 | unsigned int version_major; | |
137 | unsigned int version_minor; | |
138 | unsigned char manufacturer_id; | |
139 | unsigned char product_props; | |
140 | unsigned char product_info[2]; | |
141 | unsigned char date_code[3]; | |
142 | unsigned short tester_id; | |
143 | unsigned short serial_number; | |
144 | unsigned char product_id_string[11]; | |
145 | struct list_head support_fn_list; | |
146 | }; | |
147 | ||
148 | /** | |
149 | * struct synaptics_rmi4_data - contains the rmi4 device data | |
150 | * @rmi4_mod_info: structure variable for rmi4 device info | |
151 | * @input_dev: pointer for input device | |
152 | * @i2c_client: pointer for i2c client | |
153 | * @board: constant pointer for touch platform data | |
154 | * @fn_list_mutex: mutex for funtion list | |
155 | * @rmi4_page_mutex: mutex for rmi4 page | |
156 | * @current_page: variable for integer | |
157 | * @number_of_interrupt_register: interrupt registers count | |
158 | * @fn01_ctrl_base_addr: control base address for fn01 | |
159 | * @fn01_query_base_addr: query base address for fn01 | |
160 | * @fn01_data_base_addr: data base address for fn01 | |
161 | * @sensor_max_x: sensor maximum x value | |
162 | * @sensor_max_y: sensor maximum y value | |
163 | * @regulator: pointer to the regulator structure | |
164 | * @wait: wait queue structure variable | |
165 | * @touch_stopped: flag to stop the thread function | |
166 | * | |
167 | * This structure gives the device data information. | |
168 | */ | |
169 | struct synaptics_rmi4_data { | |
170 | struct synaptics_rmi4_device_info rmi4_mod_info; | |
171 | struct input_dev *input_dev; | |
172 | struct i2c_client *i2c_client; | |
173 | const struct synaptics_rmi4_platform_data *board; | |
174 | struct mutex fn_list_mutex; | |
175 | struct mutex rmi4_page_mutex; | |
176 | int current_page; | |
177 | unsigned int number_of_interrupt_register; | |
178 | unsigned short fn01_ctrl_base_addr; | |
179 | unsigned short fn01_query_base_addr; | |
180 | unsigned short fn01_data_base_addr; | |
181 | int sensor_max_x; | |
182 | int sensor_max_y; | |
183 | struct regulator *regulator; | |
184 | wait_queue_head_t wait; | |
185 | bool touch_stopped; | |
186 | }; | |
187 | ||
188 | /** | |
189 | * synaptics_rmi4_set_page() - sets the page | |
190 | * @pdata: pointer to synaptics_rmi4_data structure | |
191 | * @address: set the address of the page | |
192 | * | |
193 | * This function is used to set the page and returns integer. | |
194 | */ | |
195 | static int synaptics_rmi4_set_page(struct synaptics_rmi4_data *pdata, | |
196 | unsigned int address) | |
197 | { | |
198 | unsigned char txbuf[PAGE_LEN]; | |
199 | int retval; | |
200 | unsigned int page; | |
201 | struct i2c_client *i2c = pdata->i2c_client; | |
202 | ||
203 | page = ((address >> 8) & MASK_8BIT); | |
204 | if (page != pdata->current_page) { | |
205 | txbuf[0] = MASK_8BIT; | |
206 | txbuf[1] = page; | |
207 | retval = i2c_master_send(i2c, txbuf, PAGE_LEN); | |
208 | if (retval != PAGE_LEN) | |
209 | dev_err(&i2c->dev, "%s:failed:%d\n", __func__, retval); | |
210 | else | |
211 | pdata->current_page = page; | |
212 | } else | |
213 | retval = PAGE_LEN; | |
214 | return retval; | |
215 | } | |
216 | /** | |
217 | * synaptics_rmi4_i2c_block_read() - read the block of data | |
218 | * @pdata: pointer to synaptics_rmi4_data structure | |
219 | * @address: read the block of data from this offset | |
220 | * @valp: pointer to a buffer containing the data to be read | |
221 | * @size: number of bytes to read | |
222 | * | |
223 | * This function is to read the block of data and returns integer. | |
224 | */ | |
225 | static int synaptics_rmi4_i2c_block_read(struct synaptics_rmi4_data *pdata, | |
226 | unsigned short address, | |
227 | unsigned char *valp, int size) | |
228 | { | |
229 | int retval = 0; | |
230 | int retry_count = 0; | |
231 | int index; | |
232 | struct i2c_client *i2c = pdata->i2c_client; | |
233 | ||
234 | mutex_lock(&(pdata->rmi4_page_mutex)); | |
235 | retval = synaptics_rmi4_set_page(pdata, address); | |
236 | if (retval != PAGE_LEN) | |
237 | goto exit; | |
238 | index = address & MASK_8BIT; | |
239 | retry: | |
240 | retval = i2c_smbus_read_i2c_block_data(i2c, index, size, valp); | |
241 | if (retval != size) { | |
242 | if (++retry_count == MAX_RETRY_COUNT) | |
243 | dev_err(&i2c->dev, | |
244 | "%s:address 0x%04x size %d failed:%d\n", | |
245 | __func__, address, size, retval); | |
246 | else { | |
247 | synaptics_rmi4_set_page(pdata, address); | |
248 | goto retry; | |
249 | } | |
250 | } | |
251 | exit: | |
252 | mutex_unlock(&(pdata->rmi4_page_mutex)); | |
253 | return retval; | |
254 | } | |
255 | ||
256 | /** | |
257 | * synaptics_rmi4_i2c_byte_write() - write the single byte data | |
258 | * @pdata: pointer to synaptics_rmi4_data structure | |
259 | * @address: write the block of data from this offset | |
260 | * @data: data to be write | |
261 | * | |
262 | * This function is to write the single byte data and returns integer. | |
263 | */ | |
264 | static int synaptics_rmi4_i2c_byte_write(struct synaptics_rmi4_data *pdata, | |
265 | unsigned short address, | |
266 | unsigned char data) | |
267 | { | |
268 | unsigned char txbuf[2]; | |
269 | int retval = 0; | |
270 | struct i2c_client *i2c = pdata->i2c_client; | |
271 | ||
272 | /* Can't have anyone else changing the page behind our backs */ | |
273 | mutex_lock(&(pdata->rmi4_page_mutex)); | |
274 | ||
275 | retval = synaptics_rmi4_set_page(pdata, address); | |
276 | if (retval != PAGE_LEN) | |
277 | goto exit; | |
278 | txbuf[0] = address & MASK_8BIT; | |
279 | txbuf[1] = data; | |
280 | retval = i2c_master_send(pdata->i2c_client, txbuf, 2); | |
281 | /* Add in retry on writes only in certian error return values */ | |
282 | if (retval != 2) { | |
283 | dev_err(&i2c->dev, "%s:failed:%d\n", __func__, retval); | |
284 | retval = -EIO; | |
285 | } else | |
286 | retval = 1; | |
287 | exit: | |
288 | mutex_unlock(&(pdata->rmi4_page_mutex)); | |
289 | return retval; | |
290 | } | |
291 | ||
292 | /** | |
293 | * synpatics_rmi4_touchpad_report() - reports for the rmi4 touchpad device | |
294 | * @pdata: pointer to synaptics_rmi4_data structure | |
295 | * @rfi: pointer to synaptics_rmi4_fn structure | |
296 | * | |
297 | * This function calls to reports for the rmi4 touchpad device | |
298 | */ | |
299 | static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata, | |
300 | struct synaptics_rmi4_fn *rfi) | |
301 | { | |
302 | /* number of touch points - fingers down in this case */ | |
303 | int touch_count = 0; | |
304 | int finger; | |
305 | int fingers_supported; | |
306 | int finger_registers; | |
307 | int reg; | |
308 | int finger_shift; | |
309 | int finger_status; | |
310 | int retval; | |
311 | unsigned short data_base_addr; | |
312 | unsigned short data_offset; | |
313 | unsigned char data_reg_blk_size; | |
314 | unsigned char values[2]; | |
315 | unsigned char data[DATA_LEN]; | |
316 | int x[RMI4_NUMBER_OF_MAX_FINGERS]; | |
317 | int y[RMI4_NUMBER_OF_MAX_FINGERS]; | |
318 | int wx[RMI4_NUMBER_OF_MAX_FINGERS]; | |
319 | int wy[RMI4_NUMBER_OF_MAX_FINGERS]; | |
320 | struct i2c_client *client = pdata->i2c_client; | |
321 | ||
322 | /* get 2D sensor finger data */ | |
323 | /* | |
324 | * First get the finger status field - the size of the finger status | |
325 | * field is determined by the number of finger supporte - 2 bits per | |
326 | * finger, so the number of registers to read is: | |
327 | * registerCount = ceil(numberOfFingers/4). | |
328 | * Read the required number of registers and check each 2 bit field to | |
329 | * determine if a finger is down: | |
330 | * 00 = finger not present, | |
331 | * 01 = finger present and data accurate, | |
332 | * 10 = finger present but data may not be accurate, | |
333 | * 11 = reserved for product use. | |
334 | */ | |
335 | fingers_supported = rfi->num_of_data_points; | |
336 | finger_registers = (fingers_supported + 3)/4; | |
337 | data_base_addr = rfi->fn_desc.data_base_addr; | |
338 | retval = synaptics_rmi4_i2c_block_read(pdata, data_base_addr, values, | |
339 | finger_registers); | |
340 | if (retval != finger_registers) { | |
341 | dev_err(&client->dev, "%s:read status registers failed\n", | |
342 | __func__); | |
343 | return 0; | |
344 | } | |
345 | /* | |
346 | * For each finger present, read the proper number of registers | |
347 | * to get absolute data. | |
348 | */ | |
349 | data_reg_blk_size = rfi->size_of_data_register_block; | |
350 | for (finger = 0; finger < fingers_supported; finger++) { | |
351 | /* determine which data byte the finger status is in */ | |
352 | reg = finger/4; | |
353 | /* bit shift to get finger's status */ | |
354 | finger_shift = (finger % 4) * 2; | |
355 | finger_status = (values[reg] >> finger_shift) & 3; | |
356 | /* | |
357 | * if finger status indicates a finger is present then | |
358 | * read the finger data and report it | |
359 | */ | |
360 | if (finger_status == 1 || finger_status == 2) { | |
361 | /* Read the finger data */ | |
362 | data_offset = data_base_addr + | |
363 | ((finger * data_reg_blk_size) + | |
364 | finger_registers); | |
365 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
366 | data_offset, data, | |
367 | data_reg_blk_size); | |
368 | if (retval != data_reg_blk_size) { | |
369 | printk(KERN_ERR "%s:read data failed\n", | |
370 | __func__); | |
371 | return 0; | |
372 | } else { | |
373 | x[touch_count] = | |
374 | (data[0] << 4) | (data[2] & MASK_4BIT); | |
375 | y[touch_count] = | |
376 | (data[1] << 4) | | |
377 | ((data[2] >> 4) & MASK_4BIT); | |
378 | wy[touch_count] = | |
379 | (data[3] >> 4) & MASK_4BIT; | |
380 | wx[touch_count] = | |
381 | (data[3] & MASK_4BIT); | |
382 | ||
383 | if (pdata->board->x_flip) | |
384 | x[touch_count] = | |
385 | pdata->sensor_max_x - | |
386 | x[touch_count]; | |
387 | if (pdata->board->y_flip) | |
388 | y[touch_count] = | |
389 | pdata->sensor_max_y - | |
390 | y[touch_count]; | |
391 | } | |
392 | /* number of active touch points */ | |
393 | touch_count++; | |
394 | } | |
395 | } | |
396 | ||
397 | /* report to input subsystem */ | |
398 | if (touch_count) { | |
399 | for (finger = 0; finger < touch_count; finger++) { | |
400 | input_report_abs(pdata->input_dev, ABS_MT_TOUCH_MAJOR, | |
401 | max(wx[finger] , wy[finger])); | |
402 | input_report_abs(pdata->input_dev, ABS_MT_POSITION_X, | |
403 | x[finger]); | |
404 | input_report_abs(pdata->input_dev, ABS_MT_POSITION_Y, | |
405 | y[finger]); | |
406 | input_mt_sync(pdata->input_dev); | |
407 | } | |
408 | } else | |
409 | input_mt_sync(pdata->input_dev); | |
410 | ||
411 | /* sync after groups of events */ | |
412 | input_sync(pdata->input_dev); | |
413 | /* return the number of touch points */ | |
414 | return touch_count; | |
415 | } | |
416 | ||
417 | /** | |
418 | * synaptics_rmi4_report_device() - reports the rmi4 device | |
419 | * @pdata: pointer to synaptics_rmi4_data structure | |
420 | * @rfi: pointer to synaptics_rmi4_fn | |
421 | * | |
422 | * This function is used to call the report function of the rmi4 device. | |
423 | */ | |
424 | static int synaptics_rmi4_report_device(struct synaptics_rmi4_data *pdata, | |
425 | struct synaptics_rmi4_fn *rfi) | |
426 | { | |
427 | int touch = 0; | |
428 | struct i2c_client *client = pdata->i2c_client; | |
429 | static int num_error_reports; | |
430 | if (rfi->fn_number != SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) { | |
431 | num_error_reports++; | |
432 | if (num_error_reports < MAX_ERROR_REPORT) | |
433 | dev_err(&client->dev, "%s:report not supported\n", | |
434 | __func__); | |
435 | } else | |
436 | touch = synpatics_rmi4_touchpad_report(pdata, rfi); | |
437 | return touch; | |
438 | } | |
439 | /** | |
440 | * synaptics_rmi4_sensor_report() - reports to input subsystem | |
441 | * @pdata: pointer to synaptics_rmi4_data structure | |
442 | * | |
443 | * This function is used to reads in all data sources and reports | |
444 | * them to the input subsystem. | |
445 | */ | |
446 | static int synaptics_rmi4_sensor_report(struct synaptics_rmi4_data *pdata) | |
447 | { | |
448 | unsigned char intr_status[4]; | |
449 | /* number of touch points - fingers or buttons */ | |
450 | int touch = 0; | |
451 | unsigned int retval; | |
452 | struct synaptics_rmi4_fn *rfi; | |
453 | struct synaptics_rmi4_device_info *rmi; | |
454 | struct i2c_client *client = pdata->i2c_client; | |
455 | ||
456 | /* | |
457 | * Get the interrupt status from the function $01 | |
458 | * control register+1 to find which source(s) were interrupting | |
459 | * so we can read the data from the source(s) (2D sensor, buttons..) | |
460 | */ | |
461 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
462 | pdata->fn01_data_base_addr + 1, | |
463 | intr_status, | |
464 | pdata->number_of_interrupt_register); | |
465 | if (retval != pdata->number_of_interrupt_register) { | |
466 | dev_err(&client->dev, | |
467 | "could not read interrupt status registers\n"); | |
468 | return 0; | |
469 | } | |
470 | /* | |
471 | * check each function that has data sources and if the interrupt for | |
472 | * that triggered then call that RMI4 functions report() function to | |
473 | * gather data and report it to the input subsystem | |
474 | */ | |
475 | rmi = &(pdata->rmi4_mod_info); | |
476 | list_for_each_entry(rfi, &rmi->support_fn_list, link) { | |
477 | if (rfi->num_of_data_sources) { | |
478 | if (intr_status[rfi->index_to_intr_reg] & | |
479 | rfi->intr_mask) | |
480 | touch = synaptics_rmi4_report_device(pdata, | |
481 | rfi); | |
482 | } | |
483 | } | |
484 | /* return the number of touch points */ | |
485 | return touch; | |
486 | } | |
487 | ||
488 | /** | |
489 | * synaptics_rmi4_irq() - thread function for rmi4 attention line | |
490 | * @irq: irq value | |
491 | * @data: void pointer | |
492 | * | |
493 | * This function is interrupt thread function. It just notifies the | |
494 | * application layer that attention is required. | |
495 | */ | |
496 | static irqreturn_t synaptics_rmi4_irq(int irq, void *data) | |
497 | { | |
498 | struct synaptics_rmi4_data *pdata = data; | |
499 | int touch_count; | |
500 | do { | |
501 | touch_count = synaptics_rmi4_sensor_report(pdata); | |
502 | if (touch_count) | |
503 | wait_event_timeout(pdata->wait, pdata->touch_stopped, | |
504 | msecs_to_jiffies(1)); | |
505 | else | |
506 | break; | |
507 | } while (!pdata->touch_stopped); | |
508 | return IRQ_HANDLED; | |
509 | } | |
510 | ||
511 | /** | |
512 | * synpatics_rmi4_touchpad_detect() - detects the rmi4 touchpad device | |
513 | * @pdata: pointer to synaptics_rmi4_data structure | |
514 | * @rfi: pointer to synaptics_rmi4_fn structure | |
515 | * @fd: pointer to synaptics_rmi4_fn_desc structure | |
516 | * @interruptcount: count the number of interrupts | |
517 | * | |
518 | * This function calls to detects the rmi4 touchpad device | |
519 | */ | |
520 | static int synpatics_rmi4_touchpad_detect(struct synaptics_rmi4_data *pdata, | |
521 | struct synaptics_rmi4_fn *rfi, | |
522 | struct synaptics_rmi4_fn_desc *fd, | |
523 | unsigned int interruptcount) | |
524 | { | |
525 | unsigned char queries[QUERY_LEN]; | |
526 | unsigned short intr_offset; | |
527 | unsigned char abs_data_size; | |
528 | unsigned char abs_data_blk_size; | |
529 | unsigned char egr_0, egr_1; | |
530 | unsigned int all_data_blk_size; | |
531 | int has_pinch, has_flick, has_tap; | |
532 | int has_tapandhold, has_doubletap; | |
533 | int has_earlytap, has_press; | |
534 | int has_palmdetect, has_rotate; | |
535 | int has_rel; | |
536 | int i; | |
537 | int retval; | |
538 | struct i2c_client *client = pdata->i2c_client; | |
539 | ||
540 | rfi->fn_desc.query_base_addr = fd->query_base_addr; | |
541 | rfi->fn_desc.data_base_addr = fd->data_base_addr; | |
542 | rfi->fn_desc.intr_src_count = fd->intr_src_count; | |
543 | rfi->fn_desc.fn_number = fd->fn_number; | |
544 | rfi->fn_number = fd->fn_number; | |
545 | rfi->num_of_data_sources = fd->intr_src_count; | |
546 | rfi->fn_desc.ctrl_base_addr = fd->ctrl_base_addr; | |
547 | rfi->fn_desc.cmd_base_addr = fd->cmd_base_addr; | |
548 | ||
549 | /* | |
550 | * need to get number of fingers supported, data size, etc. | |
551 | * to be used when getting data since the number of registers to | |
552 | * read depends on the number of fingers supported and data size. | |
553 | */ | |
554 | retval = synaptics_rmi4_i2c_block_read(pdata, fd->query_base_addr, | |
555 | queries, | |
556 | sizeof(queries)); | |
557 | if (retval != sizeof(queries)) { | |
558 | dev_err(&client->dev, "%s:read function query registers\n", | |
559 | __func__); | |
560 | return retval; | |
561 | } | |
562 | /* | |
563 | * 2D data sources have only 3 bits for the number of fingers | |
564 | * supported - so the encoding is a bit wierd. | |
565 | */ | |
566 | if ((queries[1] & MASK_3BIT) <= 4) | |
567 | /* add 1 since zero based */ | |
568 | rfi->num_of_data_points = (queries[1] & MASK_3BIT) + 1; | |
569 | else { | |
570 | /* | |
571 | * a value of 5 is up to 10 fingers - 6 and 7 are reserved | |
572 | * (shouldn't get these i int retval;n a normal 2D source). | |
573 | */ | |
574 | if ((queries[1] & MASK_3BIT) == 5) | |
575 | rfi->num_of_data_points = 10; | |
576 | } | |
577 | /* Need to get interrupt info for handling interrupts */ | |
578 | rfi->index_to_intr_reg = (interruptcount + 7)/8; | |
579 | if (rfi->index_to_intr_reg != 0) | |
580 | rfi->index_to_intr_reg -= 1; | |
581 | /* | |
582 | * loop through interrupts for each source in fn $11 | |
583 | * and or in a bit to the interrupt mask for each. | |
584 | */ | |
585 | intr_offset = interruptcount % 8; | |
586 | rfi->intr_mask = 0; | |
587 | for (i = intr_offset; | |
588 | i < ((fd->intr_src_count & MASK_3BIT) + intr_offset); i++) | |
589 | rfi->intr_mask |= 1 << i; | |
590 | ||
591 | /* Size of just the absolute data for one finger */ | |
592 | abs_data_size = queries[5] & MASK_2BIT; | |
593 | /* One each for X and Y, one for LSB for X & Y, one for W, one for Z */ | |
594 | abs_data_blk_size = 3 + (2 * (abs_data_size == 0 ? 1 : 0)); | |
595 | rfi->size_of_data_register_block = abs_data_blk_size; | |
596 | ||
597 | /* | |
598 | * need to determine the size of data to read - this depends on | |
599 | * conditions such as whether Relative data is reported and if Gesture | |
600 | * data is reported. | |
601 | */ | |
602 | egr_0 = queries[7]; | |
603 | egr_1 = queries[8]; | |
604 | ||
605 | /* | |
606 | * Get info about what EGR data is supported, whether it has | |
607 | * Relative data supported, etc. | |
608 | */ | |
609 | has_pinch = egr_0 & HAS_PINCH; | |
610 | has_flick = egr_0 & HAS_FLICK; | |
611 | has_tap = egr_0 & HAS_TAP; | |
612 | has_earlytap = egr_0 & HAS_EARLYTAP; | |
613 | has_press = egr_0 & HAS_PRESS; | |
614 | has_rotate = egr_1 & HAS_ROTATE; | |
615 | has_rel = queries[1] & HAS_RELEASE; | |
616 | has_tapandhold = egr_0 & HAS_TAPANDHOLD; | |
617 | has_doubletap = egr_0 & HAS_DOUBLETAP; | |
618 | has_palmdetect = egr_1 & HAS_PALMDETECT; | |
619 | ||
620 | /* | |
621 | * Size of all data including finger status, absolute data for each | |
622 | * finger, relative data and EGR data | |
623 | */ | |
624 | all_data_blk_size = | |
625 | /* finger status, four fingers per register */ | |
626 | ((rfi->num_of_data_points + 3) / 4) + | |
627 | /* absolute data, per finger times number of fingers */ | |
628 | (abs_data_blk_size * rfi->num_of_data_points) + | |
629 | /* | |
630 | * two relative registers (if relative is being reported) | |
631 | */ | |
632 | 2 * has_rel + | |
633 | /* | |
634 | * F11_2D_data8 is only present if the egr_0 | |
635 | * register is non-zero. | |
636 | */ | |
637 | !!(egr_0) + | |
638 | /* | |
639 | * F11_2D_data9 is only present if either egr_0 or | |
640 | * egr_1 registers are non-zero. | |
641 | */ | |
642 | (egr_0 || egr_1) + | |
643 | /* | |
644 | * F11_2D_data10 is only present if EGR_PINCH or EGR_FLICK of | |
645 | * egr_0 reports as 1. | |
646 | */ | |
647 | !!(has_pinch | has_flick) + | |
648 | /* | |
649 | * F11_2D_data11 and F11_2D_data12 are only present if | |
650 | * EGR_FLICK of egr_0 reports as 1. | |
651 | */ | |
652 | 2 * !!(has_flick); | |
653 | return retval; | |
654 | } | |
655 | ||
656 | /** | |
657 | * synpatics_rmi4_touchpad_config() - confiures the rmi4 touchpad device | |
658 | * @pdata: pointer to synaptics_rmi4_data structure | |
659 | * @rfi: pointer to synaptics_rmi4_fn structure | |
660 | * | |
661 | * This function calls to confiures the rmi4 touchpad device | |
662 | */ | |
663 | int synpatics_rmi4_touchpad_config(struct synaptics_rmi4_data *pdata, | |
664 | struct synaptics_rmi4_fn *rfi) | |
665 | { | |
666 | /* | |
667 | * For the data source - print info and do any | |
668 | * source specific configuration. | |
669 | */ | |
670 | unsigned char data[BUF_LEN]; | |
671 | int retval = 0; | |
672 | struct i2c_client *client = pdata->i2c_client; | |
673 | ||
674 | /* Get and print some info about the data source... */ | |
675 | /* To Query 2D devices we need to read from the address obtained | |
676 | * from the function descriptor stored in the RMI function info. | |
677 | */ | |
678 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
679 | rfi->fn_desc.query_base_addr, | |
680 | data, QUERY_LEN); | |
681 | if (retval != QUERY_LEN) | |
682 | dev_err(&client->dev, "%s:read query registers failed\n", | |
683 | __func__); | |
684 | else { | |
685 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
686 | rfi->fn_desc.ctrl_base_addr, | |
687 | data, DATA_BUF_LEN); | |
688 | if (retval != DATA_BUF_LEN) { | |
689 | dev_err(&client->dev, | |
690 | "%s:read control registers failed\n", | |
691 | __func__); | |
692 | return retval; | |
693 | } | |
694 | /* Store these for use later*/ | |
695 | pdata->sensor_max_x = ((data[6] & MASK_8BIT) << 0) | | |
696 | ((data[7] & MASK_4BIT) << 8); | |
697 | pdata->sensor_max_y = ((data[8] & MASK_5BIT) << 0) | | |
698 | ((data[9] & MASK_4BIT) << 8); | |
699 | } | |
700 | return retval; | |
701 | } | |
702 | ||
703 | /** | |
704 | * synaptics_rmi4_i2c_query_device() - query the rmi4 device | |
705 | * @pdata: pointer to synaptics_rmi4_data structure | |
706 | * | |
707 | * This function is used to query the rmi4 device. | |
708 | */ | |
709 | static int synaptics_rmi4_i2c_query_device(struct synaptics_rmi4_data *pdata) | |
710 | { | |
711 | int i; | |
712 | int retval; | |
713 | unsigned char std_queries[STD_QUERY_LEN]; | |
714 | unsigned char intr_count = 0; | |
715 | int data_sources = 0; | |
716 | unsigned int ctrl_offset; | |
717 | struct synaptics_rmi4_fn *rfi; | |
718 | struct synaptics_rmi4_fn_desc rmi_fd; | |
719 | struct synaptics_rmi4_device_info *rmi; | |
720 | struct i2c_client *client = pdata->i2c_client; | |
721 | ||
722 | /* | |
723 | * init the physical drivers RMI module | |
724 | * info list of functions | |
725 | */ | |
726 | INIT_LIST_HEAD(&pdata->rmi4_mod_info.support_fn_list); | |
727 | ||
728 | /* | |
729 | * Read the Page Descriptor Table to determine what functions | |
730 | * are present | |
731 | */ | |
732 | for (i = PDT_START_SCAN_LOCATION; i > PDT_END_SCAN_LOCATION; | |
733 | i -= PDT_ENTRY_SIZE) { | |
734 | retval = synaptics_rmi4_i2c_block_read(pdata, i, | |
735 | (unsigned char *)&rmi_fd, | |
736 | sizeof(rmi_fd)); | |
737 | if (retval != sizeof(rmi_fd)) { | |
738 | /* failed to read next PDT entry */ | |
739 | dev_err(&client->dev, "%s: read error\n", __func__); | |
740 | return -EIO; | |
741 | } | |
742 | rfi = NULL; | |
743 | if (rmi_fd.fn_number) { | |
744 | switch (rmi_fd.fn_number & MASK_8BIT) { | |
745 | case SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM: | |
746 | pdata->fn01_query_base_addr = | |
747 | rmi_fd.query_base_addr; | |
748 | pdata->fn01_ctrl_base_addr = | |
749 | rmi_fd.ctrl_base_addr; | |
750 | pdata->fn01_data_base_addr = | |
751 | rmi_fd.data_base_addr; | |
752 | break; | |
753 | case SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM: | |
754 | if (rmi_fd.intr_src_count) { | |
755 | rfi = kmalloc(sizeof(*rfi), | |
756 | GFP_KERNEL); | |
757 | if (!rfi) { | |
758 | dev_err(&client->dev, | |
759 | "%s:kmalloc failed\n", | |
760 | __func__); | |
761 | return -ENOMEM; | |
762 | } | |
763 | retval = synpatics_rmi4_touchpad_detect | |
764 | (pdata, rfi, | |
765 | &rmi_fd, | |
766 | intr_count); | |
767 | if (retval < 0) | |
768 | return retval; | |
769 | } | |
770 | break; | |
771 | } | |
772 | /* interrupt count for next iteration */ | |
773 | intr_count += (rmi_fd.intr_src_count & MASK_3BIT); | |
774 | /* | |
775 | * We only want to add functions to the list | |
776 | * that have data associated with them. | |
777 | */ | |
778 | if (rfi && rmi_fd.intr_src_count) { | |
779 | /* link this function info to the RMI module */ | |
780 | mutex_lock(&(pdata->fn_list_mutex)); | |
781 | list_add_tail(&rfi->link, | |
782 | &pdata->rmi4_mod_info.support_fn_list); | |
783 | mutex_unlock(&(pdata->fn_list_mutex)); | |
784 | } | |
785 | } else { | |
786 | /* | |
787 | * A zero in the function number | |
788 | * signals the end of the PDT | |
789 | */ | |
790 | dev_dbg(&client->dev, | |
791 | "%s:end of PDT\n", __func__); | |
792 | break; | |
793 | } | |
794 | } | |
795 | /* | |
796 | * calculate the interrupt register count - used in the | |
797 | * ISR to read the correct number of interrupt registers | |
798 | */ | |
799 | pdata->number_of_interrupt_register = (intr_count + 7) / 8; | |
800 | /* | |
801 | * Function $01 will be used to query the product properties, | |
802 | * and product ID so we had to read the PDT above first to get | |
803 | * the Fn $01 query address and prior to filling in the product | |
804 | * info. NOTE: Even an unflashed device will still have FN $01. | |
805 | */ | |
806 | ||
807 | /* Load up the standard queries and get the RMI4 module info */ | |
808 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
809 | pdata->fn01_query_base_addr, | |
810 | std_queries, | |
811 | sizeof(std_queries)); | |
812 | if (retval != sizeof(std_queries)) { | |
813 | dev_err(&client->dev, "%s:Failed reading queries\n", | |
814 | __func__); | |
815 | return -EIO; | |
816 | } | |
817 | ||
818 | /* Currently supported RMI version is 4.0 */ | |
819 | pdata->rmi4_mod_info.version_major = 4; | |
820 | pdata->rmi4_mod_info.version_minor = 0; | |
821 | /* | |
822 | * get manufacturer id, product_props, product info, | |
823 | * date code, tester id, serial num and product id (name) | |
824 | */ | |
825 | pdata->rmi4_mod_info.manufacturer_id = std_queries[0]; | |
826 | pdata->rmi4_mod_info.product_props = std_queries[1]; | |
827 | pdata->rmi4_mod_info.product_info[0] = std_queries[2]; | |
828 | pdata->rmi4_mod_info.product_info[1] = std_queries[3]; | |
829 | /* year - 2001-2032 */ | |
830 | pdata->rmi4_mod_info.date_code[0] = std_queries[4] & MASK_5BIT; | |
831 | /* month - 1-12 */ | |
832 | pdata->rmi4_mod_info.date_code[1] = std_queries[5] & MASK_4BIT; | |
833 | /* day - 1-31 */ | |
834 | pdata->rmi4_mod_info.date_code[2] = std_queries[6] & MASK_5BIT; | |
835 | pdata->rmi4_mod_info.tester_id = ((std_queries[7] & MASK_7BIT) << 8) | | |
836 | (std_queries[8] & MASK_7BIT); | |
837 | pdata->rmi4_mod_info.serial_number = | |
838 | ((std_queries[9] & MASK_7BIT) << 8) | | |
839 | (std_queries[10] & MASK_7BIT); | |
840 | memcpy(pdata->rmi4_mod_info.product_id_string, &std_queries[11], 10); | |
841 | ||
842 | /* Check if this is a Synaptics device - report if not. */ | |
843 | if (pdata->rmi4_mod_info.manufacturer_id != 1) | |
844 | dev_err(&client->dev, "%s: non-Synaptics mfg id:%d\n", | |
845 | __func__, pdata->rmi4_mod_info.manufacturer_id); | |
846 | ||
847 | list_for_each_entry(rfi, &pdata->rmi4_mod_info.support_fn_list, link) | |
848 | data_sources += rfi->num_of_data_sources; | |
849 | if (data_sources) { | |
850 | rmi = &(pdata->rmi4_mod_info); | |
851 | list_for_each_entry(rfi, &rmi->support_fn_list, link) { | |
852 | if (rfi->num_of_data_sources) { | |
853 | if (rfi->fn_number == | |
854 | SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) { | |
855 | retval = synpatics_rmi4_touchpad_config | |
856 | (pdata, rfi); | |
857 | if (retval < 0) | |
858 | return retval; | |
859 | } else | |
860 | dev_err(&client->dev, | |
861 | "%s:fn_number not supported\n", | |
862 | __func__); | |
863 | /* | |
864 | * Turn on interrupts for this | |
865 | * function's data sources. | |
866 | */ | |
867 | ctrl_offset = pdata->fn01_ctrl_base_addr + 1 + | |
868 | rfi->index_to_intr_reg; | |
869 | retval = synaptics_rmi4_i2c_byte_write(pdata, | |
870 | ctrl_offset, | |
871 | rfi->intr_mask); | |
872 | if (retval < 0) | |
873 | return retval; | |
874 | } | |
875 | } | |
876 | } | |
877 | return 0; | |
878 | } | |
879 | ||
880 | /** | |
881 | * synaptics_rmi4_probe() - Initialze the i2c-client touchscreen driver | |
882 | * @i2c: i2c client structure pointer | |
883 | * @id:i2c device id pointer | |
884 | * | |
885 | * This function will allocate and initialize the instance | |
886 | * data and request the irq and set the instance data as the clients | |
887 | * platform data then register the physical driver which will do a scan of | |
888 | * the rmi4 Physical Device Table and enumerate any rmi4 functions that | |
889 | * have data sources associated with them. | |
890 | */ | |
891 | static int __devinit synaptics_rmi4_probe | |
892 | (struct i2c_client *client, const struct i2c_device_id *dev_id) | |
893 | { | |
894 | int retval; | |
895 | unsigned char intr_status[4]; | |
896 | struct synaptics_rmi4_data *rmi4_data; | |
897 | const struct synaptics_rmi4_platform_data *platformdata = | |
898 | client->dev.platform_data; | |
899 | ||
900 | if (!i2c_check_functionality(client->adapter, | |
901 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
902 | dev_err(&client->dev, "i2c smbus byte data not supported\n"); | |
903 | return -EIO; | |
904 | } | |
905 | ||
906 | if (!platformdata) { | |
907 | dev_err(&client->dev, "%s: no platform data\n", __func__); | |
908 | return -EINVAL; | |
909 | } | |
910 | ||
911 | /* Allocate and initialize the instance data for this client */ | |
912 | rmi4_data = kzalloc(sizeof(struct synaptics_rmi4_data) * 2, | |
913 | GFP_KERNEL); | |
914 | if (!rmi4_data) { | |
915 | dev_err(&client->dev, "%s: no memory allocated\n", __func__); | |
916 | return -ENOMEM; | |
917 | } | |
918 | ||
919 | rmi4_data->input_dev = input_allocate_device(); | |
920 | if (rmi4_data->input_dev == NULL) { | |
921 | dev_err(&client->dev, "%s:input device alloc failed\n", | |
922 | __func__); | |
923 | retval = -ENOMEM; | |
924 | goto err_input; | |
925 | } | |
926 | ||
927 | dev_set_name(&client->dev, platformdata->name); | |
928 | ||
929 | if (platformdata->regulator_en) { | |
930 | rmi4_data->regulator = regulator_get(&client->dev, "v-touch"); | |
931 | if (IS_ERR(rmi4_data->regulator)) { | |
932 | dev_err(&client->dev, "%s:get regulator failed\n", | |
933 | __func__); | |
934 | retval = PTR_ERR(rmi4_data->regulator); | |
935 | goto err_regulator; | |
936 | } | |
937 | regulator_enable(rmi4_data->regulator); | |
938 | } | |
939 | ||
940 | init_waitqueue_head(&rmi4_data->wait); | |
941 | /* | |
942 | * Copy i2c_client pointer into RTID's i2c_client pointer for | |
943 | * later use in rmi4_read, rmi4_write, etc. | |
944 | */ | |
945 | rmi4_data->i2c_client = client; | |
946 | /* So we set the page correctly the first time */ | |
947 | rmi4_data->current_page = MASK_16BIT; | |
948 | rmi4_data->board = platformdata; | |
949 | rmi4_data->touch_stopped = false; | |
950 | ||
951 | /* init the mutexes for maintain the lists */ | |
952 | mutex_init(&(rmi4_data->fn_list_mutex)); | |
953 | mutex_init(&(rmi4_data->rmi4_page_mutex)); | |
954 | ||
955 | /* | |
956 | * Register physical driver - this will call the detect function that | |
957 | * will then scan the device and determine the supported | |
958 | * rmi4 functions. | |
959 | */ | |
960 | retval = synaptics_rmi4_i2c_query_device(rmi4_data); | |
961 | if (retval) { | |
962 | dev_err(&client->dev, "%s: rmi4 query device failed\n", | |
963 | __func__); | |
964 | goto err_query_dev; | |
965 | } | |
966 | ||
967 | /* Store the instance data in the i2c_client */ | |
968 | i2c_set_clientdata(client, rmi4_data); | |
969 | ||
970 | /*initialize the input device parameters */ | |
971 | rmi4_data->input_dev->name = DRIVER_NAME; | |
972 | rmi4_data->input_dev->phys = "Synaptics_Clearpad"; | |
973 | rmi4_data->input_dev->id.bustype = BUS_I2C; | |
974 | rmi4_data->input_dev->dev.parent = &client->dev; | |
975 | input_set_drvdata(rmi4_data->input_dev, rmi4_data); | |
976 | ||
977 | /* Initialize the function handlers for rmi4 */ | |
978 | set_bit(EV_SYN, rmi4_data->input_dev->evbit); | |
979 | set_bit(EV_KEY, rmi4_data->input_dev->evbit); | |
980 | set_bit(EV_ABS, rmi4_data->input_dev->evbit); | |
981 | ||
982 | input_set_abs_params(rmi4_data->input_dev, ABS_MT_POSITION_X, 0, | |
983 | rmi4_data->sensor_max_x, 0, 0); | |
984 | input_set_abs_params(rmi4_data->input_dev, ABS_MT_POSITION_Y, 0, | |
985 | rmi4_data->sensor_max_y, 0, 0); | |
986 | input_set_abs_params(rmi4_data->input_dev, ABS_MT_TOUCH_MAJOR, 0, | |
987 | MAX_TOUCH_MAJOR, 0, 0); | |
988 | ||
eba499d3 NKG |
989 | /* Clear interrupts */ |
990 | synaptics_rmi4_i2c_block_read(rmi4_data, | |
991 | rmi4_data->fn01_data_base_addr + 1, intr_status, | |
992 | rmi4_data->number_of_interrupt_register); | |
993 | retval = request_threaded_irq(platformdata->irq_number, NULL, | |
994 | synaptics_rmi4_irq, | |
995 | platformdata->irq_type, | |
996 | platformdata->name, rmi4_data); | |
997 | if (retval) { | |
998 | dev_err(&client->dev, "%s:Unable to get attn irq %d\n", | |
999 | __func__, platformdata->irq_number); | |
f32b8453 DC |
1000 | goto err_unset_clientdata; |
1001 | } | |
1002 | ||
1003 | retval = input_register_device(rmi4_data->input_dev); | |
1004 | if (retval) { | |
1005 | dev_err(&client->dev, "%s:input register failed\n", __func__); | |
1006 | goto err_free_irq; | |
eba499d3 NKG |
1007 | } |
1008 | ||
1009 | return retval; | |
1010 | ||
f32b8453 | 1011 | err_free_irq: |
eba499d3 | 1012 | free_irq(platformdata->irq_number, rmi4_data); |
f32b8453 | 1013 | err_unset_clientdata: |
eba499d3 NKG |
1014 | i2c_set_clientdata(client, NULL); |
1015 | err_query_dev: | |
1016 | if (platformdata->regulator_en) { | |
1017 | regulator_disable(rmi4_data->regulator); | |
1018 | regulator_put(rmi4_data->regulator); | |
1019 | } | |
1020 | err_regulator: | |
1021 | input_free_device(rmi4_data->input_dev); | |
1022 | rmi4_data->input_dev = NULL; | |
1023 | err_input: | |
1024 | kfree(rmi4_data); | |
1025 | ||
1026 | return retval; | |
1027 | } | |
1028 | /** | |
1029 | * synaptics_rmi4_remove() - Removes the i2c-client touchscreen driver | |
1030 | * @client: i2c client structure pointer | |
1031 | * | |
1032 | * This funtion uses to remove the i2c-client | |
1033 | * touchscreen driver and returns integer. | |
1034 | */ | |
1035 | static int __devexit synaptics_rmi4_remove(struct i2c_client *client) | |
1036 | { | |
1037 | struct synaptics_rmi4_data *rmi4_data = i2c_get_clientdata(client); | |
1038 | const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board; | |
1039 | ||
1040 | rmi4_data->touch_stopped = true; | |
1041 | wake_up(&rmi4_data->wait); | |
1042 | free_irq(pdata->irq_number, rmi4_data); | |
1043 | input_unregister_device(rmi4_data->input_dev); | |
1044 | if (pdata->regulator_en) { | |
1045 | regulator_disable(rmi4_data->regulator); | |
1046 | regulator_put(rmi4_data->regulator); | |
1047 | } | |
1048 | kfree(rmi4_data); | |
1049 | ||
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | #ifdef CONFIG_PM | |
1054 | /** | |
1055 | * synaptics_rmi4_suspend() - suspend the touch screen controller | |
1056 | * @dev: pointer to device structure | |
1057 | * | |
1058 | * This funtion is used to suspend the | |
1059 | * touch panel controller and returns integer | |
1060 | */ | |
1061 | static int synaptics_rmi4_suspend(struct device *dev) | |
1062 | { | |
1063 | /* Touch sleep mode */ | |
1064 | int retval; | |
1065 | unsigned char intr_status; | |
1066 | struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev); | |
1067 | const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board; | |
1068 | ||
1069 | rmi4_data->touch_stopped = true; | |
1070 | disable_irq(pdata->irq_number); | |
1071 | ||
1072 | retval = synaptics_rmi4_i2c_block_read(rmi4_data, | |
1073 | rmi4_data->fn01_data_base_addr + 1, | |
1074 | &intr_status, | |
1075 | rmi4_data->number_of_interrupt_register); | |
1076 | if (retval < 0) | |
1077 | return retval; | |
1078 | ||
1079 | retval = synaptics_rmi4_i2c_byte_write(rmi4_data, | |
1080 | rmi4_data->fn01_ctrl_base_addr + 1, | |
1081 | (intr_status & ~TOUCHPAD_CTRL_INTR)); | |
1082 | if (retval < 0) | |
1083 | return retval; | |
1084 | ||
1085 | if (pdata->regulator_en) | |
1086 | regulator_disable(rmi4_data->regulator); | |
1087 | ||
1088 | return 0; | |
1089 | } | |
1090 | /** | |
1091 | * synaptics_rmi4_resume() - resume the touch screen controller | |
1092 | * @dev: pointer to device structure | |
1093 | * | |
1094 | * This funtion is used to resume the touch panel | |
1095 | * controller and returns integer. | |
1096 | */ | |
1097 | static int synaptics_rmi4_resume(struct device *dev) | |
1098 | { | |
1099 | int retval; | |
1100 | unsigned char intr_status; | |
1101 | struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev); | |
1102 | const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board; | |
1103 | ||
1104 | if (pdata->regulator_en) | |
1105 | regulator_enable(rmi4_data->regulator); | |
1106 | ||
1107 | enable_irq(pdata->irq_number); | |
1108 | rmi4_data->touch_stopped = false; | |
1109 | ||
1110 | retval = synaptics_rmi4_i2c_block_read(rmi4_data, | |
1111 | rmi4_data->fn01_data_base_addr + 1, | |
1112 | &intr_status, | |
1113 | rmi4_data->number_of_interrupt_register); | |
1114 | if (retval < 0) | |
1115 | return retval; | |
1116 | ||
1117 | retval = synaptics_rmi4_i2c_byte_write(rmi4_data, | |
1118 | rmi4_data->fn01_ctrl_base_addr + 1, | |
1119 | (intr_status | TOUCHPAD_CTRL_INTR)); | |
1120 | if (retval < 0) | |
1121 | return retval; | |
1122 | ||
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | static const struct dev_pm_ops synaptics_rmi4_dev_pm_ops = { | |
1127 | .suspend = synaptics_rmi4_suspend, | |
1128 | .resume = synaptics_rmi4_resume, | |
1129 | }; | |
1130 | #endif | |
1131 | ||
1132 | static const struct i2c_device_id synaptics_rmi4_id_table[] = { | |
1133 | { DRIVER_NAME, 0 }, | |
1134 | { }, | |
1135 | }; | |
1136 | MODULE_DEVICE_TABLE(i2c, synaptics_rmi4_id_table); | |
1137 | ||
1138 | static struct i2c_driver synaptics_rmi4_driver = { | |
1139 | .driver = { | |
1140 | .name = DRIVER_NAME, | |
1141 | .owner = THIS_MODULE, | |
1142 | #ifdef CONFIG_PM | |
1143 | .pm = &synaptics_rmi4_dev_pm_ops, | |
1144 | #endif | |
1145 | }, | |
1146 | .probe = synaptics_rmi4_probe, | |
1147 | .remove = __devexit_p(synaptics_rmi4_remove), | |
1148 | .id_table = synaptics_rmi4_id_table, | |
1149 | }; | |
1150 | /** | |
1151 | * synaptics_rmi4_init() - Initialize the touchscreen driver | |
1152 | * | |
1153 | * This funtion uses to initializes the synaptics | |
1154 | * touchscreen driver and returns integer. | |
1155 | */ | |
1156 | static int __init synaptics_rmi4_init(void) | |
1157 | { | |
1158 | return i2c_add_driver(&synaptics_rmi4_driver); | |
1159 | } | |
1160 | /** | |
1161 | * synaptics_rmi4_exit() - De-initialize the touchscreen driver | |
1162 | * | |
1163 | * This funtion uses to de-initialize the synaptics | |
1164 | * touchscreen driver and returns none. | |
1165 | */ | |
1166 | static void __exit synaptics_rmi4_exit(void) | |
1167 | { | |
1168 | i2c_del_driver(&synaptics_rmi4_driver); | |
1169 | } | |
1170 | ||
1171 | ||
1172 | module_init(synaptics_rmi4_init); | |
1173 | module_exit(synaptics_rmi4_exit); | |
1174 | ||
1175 | MODULE_LICENSE("GPL v2"); | |
1176 | MODULE_AUTHOR("naveen.gaddipati@stericsson.com, js.ha@stericsson.com"); | |
1177 | MODULE_DESCRIPTION("synaptics rmi4 i2c touch Driver"); | |
1178 | MODULE_ALIAS("i2c:synaptics_rmi4_ts"); |